Can somebody please teach me how to install steam onto Debian Wheezy 64 bit? I'm new to linux.Listing the codes to be typed in the terminal would be greatly appreciated. Thanks in advance. Hope this can serve as an aid to other linux noobs.

Debian as a distro is more tailored towards intermediate users. Because Steam uses later packages than Debian stable, you'll have to use Debian unstable. To do this, you need to go to the

/etc/apt/sources.list

file and change anything with 'wheezy' to 'jessie'.

Do this at your own risk, hence the term 'unstable'; although the term itself is rather misleading since it's not that unstable, so to speak.

Then, you'll need to make your new system multiarch. To do this, you just type:

dpkg -add-architecture i386

If you want to check which architecture you have currently, type:

dpkg --print-architecture

I don't use Debian at home so my help can be limited; I'm only giving you instructions from what I know on Ubuntu since Ubuntu is Debian-based. If anything, I think Ubuntu or Linux Mint are good starting points for you since you'll need to also sort out your GPU's drivers which would be easier to install under the latter distros than Debian. Although, it is not impossible on Debian but just more tedious because Debian is on and on about FOSS.

Debian as a distro is more tailored towards intermediate users. Because Steam uses later packages than Debian stable, you'll have to use Debian unstable. To do this, you need to go to the

/etc/apt/sources.list

file and change anything with 'wheezy' to 'jessie'.

Do this at your own risk, hence the term 'unstable'; although the term itself is rather misleading since it's not that unstable, so to speak.

Then, you'll need to make your new system multiarch. To do this, you just type:

dpkg -add-architecture i386

If you want to check which architecture you have currently, type:

dpkg --print-architecture

I don't use Debian at home so my help can be limited; I'm only giving you instructions from what I know on Ubuntu since Ubuntu is Debian-based. If anything, I think Ubuntu or Linux Mint are good starting points for you since you'll need to also sort out your GPU's drivers which would be easier to install under the latter distros than Debian. Although, it is not impossible on Debian but just more tedious because Debian is on and on about FOSS.

I've just upgraded to debian jessie as per your suggestion. Unfortunately after installing steam and dota 2 I came across this problem when launching the game.